The queen of pop is known for crossing lines on and off stage. But she won't be claiming this slip of the nipple was a wardrobe malfunction: Madonna made it perfectly clear (see for yourself in the not-safe-for-work video) that she was deliberately flashing the crowd of roughly 55,000 people in Turkey's largest city.

The singer, 53, was performing a rendition of her 1995 hit, "Human Nature," when her dance routine turned into a strip tease. Her fans cheered for her as she began taking off her shirt and undoing her pants. The dance culminated in Madonna pulling down her bra to briefly expose her right breast. The singer is in the middle of her world tour, promoting her new album, "MDNA."

This is obviously not the first stunt the singer has made to get people talking, and we're betting it won't be the last. Last week, Madonna also courted controversy on the road after placing an image of a swastika on a picture of French National Front leader Marine Le Pen during a show in Tel Aviv.

Le Pen has since threatened with the prospect of legal action. The politician has said that if the incident is repeated when Madonna's tour arrives in France in July, she will sue.

"We understand how old singers who need to get people talking about them go to such extremes," Le Pen told The Daily Mail. When she was asked if she would sue Madonna, Le Pen replied: "If she does that in France, we'll be waiting."